EXAMINATION OF PUS AND EXUDATES 113 



If gonorrheal discharge, stain the cover-glass preparations 

 with an alcoholic solution of eosin and alkaline methylene 

 blue, or with carbol fuchsin. Note the appearance of the 

 cocci both within and outside of the pus cells. 



If from supposed tuberculosis, stain for that organism. 



If from diphtheria, stain for that organism and note the 

 morphology of the bacteria. 



If from the pus of an abscess, stain for pyogenic bacteria. 



166. Making cover-glass preparations from pus. Spread as 

 thin a film of the pus as possible on the cover glass. This can 

 be readily done by drawing the edge of a square cover glass 

 over the surface of another cover glass on which a bit of the 

 pus has been placed. See method for making cover-glass 

 preparations from blood ( 122). 



